Question

A. Answer the following in not more than 20 words.
1. What does the formula of a substance tell you?
2. What do you mean by the valency of an element?​

Answer 1

Answer:

1.... A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.

2.. Valency is the combining power of an element.

Answer 2

Answer:

1. Formula tells us about the chemical constitute of the certain chemical. It also symbolises the chemical name in short.

2. The valency is the number of atoms in the certain chemical formule.